VIDEO: Justin Timberlake and Jimmy Fallon Break it Down for History of Rap 4

They've done it again! Justin Timberlake and Jimmy Fallon educated Late Night viewers with a History of Rap medley for the fourth time on Friday.The medley featured everything from the Beastie Boys' "No Sleep Till Brooklyn," The Notorious B.I.G.'s "Hypnotize" ...

They've done it again! Justin Timberlake and Jimmy Fallon educated Late Nightviewers with a History of Rap medley for the fourth time on Friday.The medley featured everything from the Beastie Boys' "No Sleep Till Brooklyn," The Notorious B.I.G.'s "Hypnotize" and Salt N Pepa's "Shoop" to Macklmore and Ryan Lewis' "Thrift Shop" and Eminem's "Lose Yourself." Plus: Check out Timberlake's and Fallon's sweet dance moves!TV Scorecard: What's renewed? What's canceled?Watch the full History of Rap 4 below.